Repair Library

15 guides

Documents · 80 free PDFs
Doors & Hardware

Door Problem: Latching, Closing, and Hardware

Watch the door through a full swing before touching a tool. Most problems are a loose hinge screw, a misaligned strike, or a closer that needs a sweep and latch adjustment. Fire-rated and egress hardware must keep working as listed: no wedges, no disabled closers, no field modifications.

Doors & Hardware

Automatic Door Won’t Open: Safe Facility Checks

An automatic pedestrian door that will not open can be in the wrong mode, lose power, have a blocked sensor, remain mechanically locked, or have an operator fault. Keep routine checks external.

Doors & Hardware

Commercial Door Won’t Latch: A Simple Alignment Checklist

A commercial door that closes but will not latch is often sagging slightly, rubbing, hitting a misaligned strike, or moving too slowly through the final inch. Use wear marks and door gaps to identify what shifted before filing or moving hardware.

Doors & Hardware

Commercial Door Closer Arm Is Loose: How to Inspect and Tighten It

A loose closer arm can make a door slam, stop short, bind, or lose control. Secure the arm, shoe, spindle connection, and closer body before touching hydraulic adjustments.

Doors & Hardware

Commercial Door Closer Slamming? How to Adjust Sweep & Latch Speed

Most hydraulic commercial door closers have separate sweep and latch-speed adjustments. Make very small valve changes, test the full closing cycle after each change, and stop if the closer is leaking oil or the adjustment valve is near its limit.

Doors & Hardware

Commercial Door Closer Won’t Close the Door: What to Check

A commercial door that stops before latching may have the closer adjusted too slowly, weak spring power, binding hinges, weatherstripping resistance, frame misalignment, or building pressure. Check mechanical drag before turning closer valves.

Doors & Hardware

Commercial Door Hinge Screws Keep Loosening: Find the Real Cause

Hinge screws that repeatedly loosen may indicate stripped holes, hinge wear, wrong fasteners, door sag, vibration, or a damaged frame reinforcement. Re-tightening every week is not a repair.

Doors & Hardware

Commercial Door Hinge Squeaking: Clean, Lubricate, or Replace?

A squeaky hinge may only need cleaning and the correct lubricant, but recurring squeaks can indicate dry bearings, wear, misalignment, or excessive door load.

Doors & Hardware

Commercial Door Key Hard to Turn: Lock, Latch, or Alignment?

A key that is hard to turn may be a cylinder problem, but often the latch or deadbolt is loaded against the strike because the door is sagging or being pushed by seals or pressure.

Doors & Hardware

Commercial Door Rubbing the Frame: How to Find the Cause

A rubbing door usually means hinges loosened, the door sagged, the frame shifted, weatherstripping swelled, or floor clearance changed. Use rub marks and reveal gaps before adjusting hardware.

Doors & Hardware

Commercial Door Sweep Dragging: How to Adjust or Replace It

A sweep that drags too hard can stop a closer from latching and make the door difficult to use. Adjust height or replace the sweep instead of increasing closer force.

Doors & Hardware

Fire Door Hold-Open Magnet Won’t Release: What Maintenance Should Check

A magnetic fire-door holder that will not release on alarm is a life-safety defect. Maintenance can check mechanical binding and observe release during an approved test, but should not alter fire-alarm wiring.

Doors & Hardware

Loose Commercial Door Lever Handle: How to Tighten It Correctly

A loose commercial lever is often caused by a loose set screw, rose/trim fasteners, through-bolts, or wear inside the lockset. Tighten the correct fastener and verify the latch works smoothly rather than simply cranking on the visible handle.

Doors & Hardware

Panic Bar Sticking: Routine Checks Before You Replace Hardware

A panic bar that sticks or does not fully retract can be caused by door sag, dirty latch areas, loose trim, misaligned strikes, or worn hardware. Because panic hardware is life-safety equipment, routine checks should stay conservative and the door must always release freely from the egress side.

Doors & Hardware

Commercial Door Closer Inspection & Preventive Maintenance

Operate the door from several positions, inspect the closer body, arm and pivots, then check the whole opening before touching an adjustment valve.